Results 91 to 100 of about 4,347 (213)

Geological remote sensing signatures of terrestrial impact craters [PDF]

open access: yes
Geological remote sensing techniques can be used to investigate structural, depositional, and shock metamorphic effects associated with hypervelocity impact structures, some of which may be linked to global Earth system catastrophies.
Garvin, J. B.   +2 more
core   +1 more source

Tectonic connections to interior processes on Venus [PDF]

open access: yes
The ultimate goal of geophysical/geological exploration of Venus is to relate the present tectonic (and volcanic) state of the lithosphere to interior processes, particularly mantle convection, operating both now and in the past. The Magellan mission has
Phillips, R. J.
core   +1 more source

On the chemical composition of Titan's dry lakebed evaporites

open access: yes, 2013
Titan, the main satellite of Saturn, has an active cycle of methane in its troposphere. Among other evidence for a mechanism of evaporation at work on the ground, dry lakebeds have been discovered.
Barnes, Jason   +2 more
core   +4 more sources

Workshop on Dust on Mars [PDF]

open access: yes
A workshop was organized to stimulate and coordinate research on the properties of Martian dust, its distribution on the planet, and the processes affecting its yearly deposition, erosion, and transport.
Lee, S.
core   +1 more source

1999 Quadrantids and the lunar Na atmosphere [PDF]

open access: yes, 2001
Enhancements of the Na emission and temperature from the lunar atmosphere were reported during the Leonids meteor showers of 1995, 1997 and 1998. Here we report a search for similar enhancement during the 1999 Quadrantids, which have the highest mass ...
Babadzhanov   +50 more
core   +3 more sources

Studies in Aeolian geology [PDF]

open access: yes
The objective of the research was to assess the significance of aeolian (windblown) processes in the evolution of planetary surfaces. The approach was to use wind tunnel simulations, field studies of possible analogs, and analyses of spacecraft ...
Greeley, Ronald
core   +1 more source

Venus: Interpreting the spatial distribution of volcanically modified craters [PDF]

open access: yes, 2014
To understand the impact cratering record on Venus, we investigate two distinct resurfacing styles: localized, thin flows and large shield volcanoes. We statistically analyze the size-frequency distribution of volcanically modified craters and, using ...
Aaron S. Wolf   +5 more
core   +2 more sources

Morphologic studies of the Moon and planets [PDF]

open access: yes
The impact, volcanic, and tectonic history of the Moon and planets were investigated over an eight year period. Research on the following topics is discussed: lunar craters, lunar basins, lunar volcanoes, correlation of Apollo geochemical data, lunar ...
El-Baz, F., Maxwell, T. A.
core   +1 more source

Radar Selection Method Based on an Improved Information Filter in the LPI Radar Network

open access: yesInternational Journal of Antennas and Propagation, 2018
In order to save the radar resources and obtain the better low probability intercept ability in the network, a novel radar selection method for target tracking based on improved interacting multiple model information filtering (IMM-IF) is presented ...
Zhenkai Zhang   +3 more
doaj   +1 more source

Power and Waveform Resource Allocation Method of LPI Netted Radar for Target Search and Tracking

open access: yesIET Radar, Sonar & Navigation
A joint power and waveform resource allocation algorithm is proposed for netted radar integrated search and tracking tasks with low probability of intercept.
Longhao Xie   +4 more
doaj   +1 more source

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